Pith Number

pith:4JBZTQ5Q

pith:2012:4JBZTQ5QGMTA7GVG4T22NKBSCS

not attested not anchored not stored refs pending

Qualitative Modelling via Constraint Programming: Past, Present and Future

Christoffer A. Jefferson, Ian Miguel, Ian P. Gent, Lars Kotthoff, Peter Nightingale, Stephen A. Linton, Thomas W. Kelsey

arxiv:1209.3916 v1 · 2012-09-18 · cs.CE · cs.AI · math.DS · q-bio.CB

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4JBZTQ5QGMTA7GVG4T22NKBSCS}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:45:22.244123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e24399c3b033260f9aa6e4f5a6a83214a07d2979edc1ff57d751c59e9f178276

Aliases

arxiv: 1209.3916 · arxiv_version: 1209.3916v1 · doi: 10.48550/arxiv.1209.3916 · pith_short_12: 4JBZTQ5QGMTA · pith_short_16: 4JBZTQ5QGMTA7GVG · pith_short_8: 4JBZTQ5Q

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/4JBZTQ5QGMTA7GVG4T22NKBSCS \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: e24399c3b033260f9aa6e4f5a6a83214a07d2979edc1ff57d751c59e9f178276

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "677ff79886857350b321076f1d0f2ad7a46433eb71e248270aae0de1edb41b9f",
    "cross_cats_sorted": [
      "cs.AI",
      "math.DS",
      "q-bio.CB"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CE",
    "submitted_at": "2012-09-18T11:57:44Z",
    "title_canon_sha256": "dfc63b6406996d7b6cd9d56584c8fb2a4898673813a5c6fa59ec534761f69d53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.3916",
    "kind": "arxiv",
    "version": 1
  }
}